<HTML>
<BODY BGCOLOR="white">
<PRE>
<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Copyright (C) 2011 Google Inc.<a name="line.2"></a>
<FONT color="green">003</FONT>     *<a name="line.3"></a>
<FONT color="green">004</FONT>     * Licensed under the Apache License, Version 2.0 (the "License"); you may not<a name="line.4"></a>
<FONT color="green">005</FONT>     * use this file except in compliance with the License. You may obtain a copy of<a name="line.5"></a>
<FONT color="green">006</FONT>     * the License at<a name="line.6"></a>
<FONT color="green">007</FONT>     *<a name="line.7"></a>
<FONT color="green">008</FONT>     * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<FONT color="green">011</FONT>     * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT<a name="line.11"></a>
<FONT color="green">012</FONT>     * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the<a name="line.12"></a>
<FONT color="green">013</FONT>     * License for the specific language governing permissions and limitations under<a name="line.13"></a>
<FONT color="green">014</FONT>     * the License.<a name="line.14"></a>
<FONT color="green">015</FONT>     */<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>    package com.google.api.gwt.oauth2.client;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import com.google.gwt.core.client.Callback;<a name="line.19"></a>
<FONT color="green">020</FONT>    import com.google.gwt.core.client.JavaScriptObject;<a name="line.20"></a>
<FONT color="green">021</FONT>    import com.google.gwt.core.client.JsArrayString;<a name="line.21"></a>
<FONT color="green">022</FONT>    import com.google.gwt.core.client.Scheduler;<a name="line.22"></a>
<FONT color="green">023</FONT>    import com.google.gwt.core.client.Scheduler.ScheduledCommand;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    /**<a name="line.25"></a>
<FONT color="green">026</FONT>     * Provides methods to manage authentication flow.<a name="line.26"></a>
<FONT color="green">027</FONT>     *<a name="line.27"></a>
<FONT color="green">028</FONT>     * @author jasonhall@google.com (Jason Hall)<a name="line.28"></a>
<FONT color="green">029</FONT>     */<a name="line.29"></a>
<FONT color="green">030</FONT>    public abstract class Auth {<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>      /** Instance of the {@link Auth} to use in a GWT application. */<a name="line.32"></a>
<FONT color="green">033</FONT>      public static final Auth get() {<a name="line.33"></a>
<FONT color="green">034</FONT>        return AuthImpl.INSTANCE;<a name="line.34"></a>
<FONT color="green">035</FONT>      }<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>      final TokenStore tokenStore;<a name="line.37"></a>
<FONT color="green">038</FONT>      private final Clock clock;<a name="line.38"></a>
<FONT color="green">039</FONT>      private final UrlCodex urlCodex;<a name="line.39"></a>
<FONT color="green">040</FONT>      final Scheduler scheduler;<a name="line.40"></a>
<FONT color="green">041</FONT>      String oauthWindowUrl;<a name="line.41"></a>
<FONT color="green">042</FONT>    <a name="line.42"></a>
<FONT color="green">043</FONT>      int height = 600;<a name="line.43"></a>
<FONT color="green">044</FONT>      int width = 800;<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>      Auth(TokenStore tokenStore, Clock clock, UrlCodex urlCodex, Scheduler scheduler,<a name="line.46"></a>
<FONT color="green">047</FONT>          String oauthWindowUrl) {<a name="line.47"></a>
<FONT color="green">048</FONT>        this.tokenStore = tokenStore;<a name="line.48"></a>
<FONT color="green">049</FONT>        this.clock = clock;<a name="line.49"></a>
<FONT color="green">050</FONT>        this.urlCodex = urlCodex;<a name="line.50"></a>
<FONT color="green">051</FONT>        this.scheduler = scheduler;<a name="line.51"></a>
<FONT color="green">052</FONT>        this.oauthWindowUrl = oauthWindowUrl;<a name="line.52"></a>
<FONT color="green">053</FONT>      }<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>      private AuthRequest lastRequest;<a name="line.55"></a>
<FONT color="green">056</FONT>      private Callback&lt;String, Throwable&gt; lastCallback;<a name="line.56"></a>
<FONT color="green">057</FONT>    <a name="line.57"></a>
<FONT color="green">058</FONT>      private static final double TEN_MINUTES = 10 * 60 * 1000;<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>      /**<a name="line.60"></a>
<FONT color="green">061</FONT>       * Request an access token from an OAuth 2.0 provider.<a name="line.61"></a>
<FONT color="green">062</FONT>       *<a name="line.62"></a>
<FONT color="green">063</FONT>       * &lt;p&gt;<a name="line.63"></a>
<FONT color="green">064</FONT>       * If it can be determined that the user has already granted access, and the<a name="line.64"></a>
<FONT color="green">065</FONT>       * token has not yet expired, and that the token will not expire soon, the<a name="line.65"></a>
<FONT color="green">066</FONT>       * existing token will be passed to the callback.<a name="line.66"></a>
<FONT color="green">067</FONT>       * &lt;/p&gt;<a name="line.67"></a>
<FONT color="green">068</FONT>       *<a name="line.68"></a>
<FONT color="green">069</FONT>       * &lt;p&gt;<a name="line.69"></a>
<FONT color="green">070</FONT>       * Otherwise, a popup window will be displayed which may prompt the user to<a name="line.70"></a>
<FONT color="green">071</FONT>       * grant access. If the user has already granted access the popup will<a name="line.71"></a>
<FONT color="green">072</FONT>       * immediately close and the token will be passed to the callback. If access<a name="line.72"></a>
<FONT color="green">073</FONT>       * hasn't been granted, the user will be prompted, and when they grant, the<a name="line.73"></a>
<FONT color="green">074</FONT>       * token will be passed to the callback.<a name="line.74"></a>
<FONT color="green">075</FONT>       * &lt;/p&gt;<a name="line.75"></a>
<FONT color="green">076</FONT>       *<a name="line.76"></a>
<FONT color="green">077</FONT>       * @param req Request for authentication.<a name="line.77"></a>
<FONT color="green">078</FONT>       * @param callback Callback to pass the token to when access has been granted.<a name="line.78"></a>
<FONT color="green">079</FONT>       */<a name="line.79"></a>
<FONT color="green">080</FONT>      public void login(AuthRequest req, final Callback&lt;String, Throwable&gt; callback) {<a name="line.80"></a>
<FONT color="green">081</FONT>        lastRequest = req;<a name="line.81"></a>
<FONT color="green">082</FONT>        lastCallback = callback;<a name="line.82"></a>
<FONT color="green">083</FONT>    <a name="line.83"></a>
<FONT color="green">084</FONT>        String authUrl = req.toUrl(urlCodex) + "&amp;redirect_uri=" + urlCodex.encode(oauthWindowUrl);<a name="line.84"></a>
<FONT color="green">085</FONT>    <a name="line.85"></a>
<FONT color="green">086</FONT>        // Try to look up the token we have stored.<a name="line.86"></a>
<FONT color="green">087</FONT>        final TokenInfo info = getToken(req);<a name="line.87"></a>
<FONT color="green">088</FONT>        if (info == null || info.expires == null || expiringSoon(info)) {<a name="line.88"></a>
<FONT color="green">089</FONT>          // Token wasn't found, or doesn't have an expiration, or is expired or<a name="line.89"></a>
<FONT color="green">090</FONT>          // expiring soon. Requesting access will refresh the token.<a name="line.90"></a>
<FONT color="green">091</FONT>          doLogin(authUrl, callback);<a name="line.91"></a>
<FONT color="green">092</FONT>        } else {<a name="line.92"></a>
<FONT color="green">093</FONT>          // Token was found and is good, immediately execute the callback with the<a name="line.93"></a>
<FONT color="green">094</FONT>          // access token.<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>          scheduler.scheduleDeferred(new ScheduledCommand() {<a name="line.96"></a>
<FONT color="green">097</FONT>            @Override<a name="line.97"></a>
<FONT color="green">098</FONT>            public void execute() {<a name="line.98"></a>
<FONT color="green">099</FONT>              callback.onSuccess(info.accessToken);<a name="line.99"></a>
<FONT color="green">100</FONT>            }<a name="line.100"></a>
<FONT color="green">101</FONT>          });<a name="line.101"></a>
<FONT color="green">102</FONT>        }<a name="line.102"></a>
<FONT color="green">103</FONT>      }<a name="line.103"></a>
<FONT color="green">104</FONT>    <a name="line.104"></a>
<FONT color="green">105</FONT>      /**<a name="line.105"></a>
<FONT color="green">106</FONT>       * Returns whether or not the token will be expiring within the next ten<a name="line.106"></a>
<FONT color="green">107</FONT>       * minutes.<a name="line.107"></a>
<FONT color="green">108</FONT>       */<a name="line.108"></a>
<FONT color="green">109</FONT>      boolean expiringSoon(TokenInfo info) {<a name="line.109"></a>
<FONT color="green">110</FONT>        // TODO(jasonhall): Consider varying the definition of "soon" based on the<a name="line.110"></a>
<FONT color="green">111</FONT>        // original expires_in value (e.g., "soon" = 1/10th of the total time before<a name="line.111"></a>
<FONT color="green">112</FONT>        // it's expired).<a name="line.112"></a>
<FONT color="green">113</FONT>        return Double.valueOf(info.expires) &lt; (clock.now() + TEN_MINUTES);<a name="line.113"></a>
<FONT color="green">114</FONT>      }<a name="line.114"></a>
<FONT color="green">115</FONT>    <a name="line.115"></a>
<FONT color="green">116</FONT>      /**<a name="line.116"></a>
<FONT color="green">117</FONT>       * Get the OAuth 2.0 token for which this application may not have already<a name="line.117"></a>
<FONT color="green">118</FONT>       * been granted access, by displaying a popup to the user.<a name="line.118"></a>
<FONT color="green">119</FONT>       */<a name="line.119"></a>
<FONT color="green">120</FONT>      abstract void doLogin(String authUrl, Callback&lt;String, Throwable&gt; callback);<a name="line.120"></a>
<FONT color="green">121</FONT>    <a name="line.121"></a>
<FONT color="green">122</FONT>      /**<a name="line.122"></a>
<FONT color="green">123</FONT>       * Set the oauth window URL to use to authenticate.<a name="line.123"></a>
<FONT color="green">124</FONT>       */<a name="line.124"></a>
<FONT color="green">125</FONT>      public Auth setOAuthWindowUrl(String url) {<a name="line.125"></a>
<FONT color="green">126</FONT>        this.oauthWindowUrl = url;<a name="line.126"></a>
<FONT color="green">127</FONT>        return this;<a name="line.127"></a>
<FONT color="green">128</FONT>      }<a name="line.128"></a>
<FONT color="green">129</FONT>    <a name="line.129"></a>
<FONT color="green">130</FONT>      /** Sets the height of the OAuth 2.0 popup dialog, in pixels. The default is 600px. */<a name="line.130"></a>
<FONT color="green">131</FONT>      public Auth setWindowHeight(int height) {<a name="line.131"></a>
<FONT color="green">132</FONT>        this.height = height;<a name="line.132"></a>
<FONT color="green">133</FONT>        return this;<a name="line.133"></a>
<FONT color="green">134</FONT>      }<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>      /* Sets the width of the OAuth 2.0 popup dialog, in pixels. The default is 800px. */<a name="line.136"></a>
<FONT color="green">137</FONT>      public Auth setWindowWidth(int width) {<a name="line.137"></a>
<FONT color="green">138</FONT>        this.width = width;<a name="line.138"></a>
<FONT color="green">139</FONT>        return this;<a name="line.139"></a>
<FONT color="green">140</FONT>      }<a name="line.140"></a>
<FONT color="green">141</FONT>    <a name="line.141"></a>
<FONT color="green">142</FONT>      /**<a name="line.142"></a>
<FONT color="green">143</FONT>       * Called by the {@code doLogin()} method which is registered as a global<a name="line.143"></a>
<FONT color="green">144</FONT>       * variable on the page.<a name="line.144"></a>
<FONT color="green">145</FONT>       */<a name="line.145"></a>
<FONT color="green">146</FONT>      // This method is called via a global method defined in AuthImpl.register()<a name="line.146"></a>
<FONT color="green">147</FONT>      @SuppressWarnings("unused")<a name="line.147"></a>
<FONT color="green">148</FONT>      void finish(String hash) {<a name="line.148"></a>
<FONT color="green">149</FONT>        TokenInfo info = new TokenInfo();<a name="line.149"></a>
<FONT color="green">150</FONT>        String error = null;<a name="line.150"></a>
<FONT color="green">151</FONT>        String errorDesc = "";<a name="line.151"></a>
<FONT color="green">152</FONT>        String errorUri = "";<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        // Iterate over keys and values in the string hash value to find relevant<a name="line.154"></a>
<FONT color="green">155</FONT>        // information like the access token or an error message. The string will be<a name="line.155"></a>
<FONT color="green">156</FONT>        // in the form of: #key1=val1&amp;key2=val2&amp;key3=val3 (etc.)<a name="line.156"></a>
<FONT color="green">157</FONT>        int idx = 1;<a name="line.157"></a>
<FONT color="green">158</FONT>        while (idx &lt; hash.length() - 1) {<a name="line.158"></a>
<FONT color="green">159</FONT>          // Grab the next key (between start and '=')<a name="line.159"></a>
<FONT color="green">160</FONT>          int nextEq = hash.indexOf('=', idx);<a name="line.160"></a>
<FONT color="green">161</FONT>          if (nextEq &lt; 0) {<a name="line.161"></a>
<FONT color="green">162</FONT>            break;<a name="line.162"></a>
<FONT color="green">163</FONT>          }<a name="line.163"></a>
<FONT color="green">164</FONT>          String key = hash.substring(idx, nextEq);<a name="line.164"></a>
<FONT color="green">165</FONT>    <a name="line.165"></a>
<FONT color="green">166</FONT>          // Grab the next value (between '=' and '&amp;')<a name="line.166"></a>
<FONT color="green">167</FONT>          int nextAmp = hash.indexOf('&amp;', nextEq);<a name="line.167"></a>
<FONT color="green">168</FONT>          nextAmp = nextAmp &lt; 0 ? hash.length() : nextAmp;<a name="line.168"></a>
<FONT color="green">169</FONT>          String val = hash.substring(nextEq + 1, nextAmp);<a name="line.169"></a>
<FONT color="green">170</FONT>    <a name="line.170"></a>
<FONT color="green">171</FONT>          // Start looking from here from now on.<a name="line.171"></a>
<FONT color="green">172</FONT>          idx = nextAmp + 1;<a name="line.172"></a>
<FONT color="green">173</FONT>    <a name="line.173"></a>
<FONT color="green">174</FONT>          // Store relevant values to be used later.<a name="line.174"></a>
<FONT color="green">175</FONT>          if (key.equals("access_token")) {<a name="line.175"></a>
<FONT color="green">176</FONT>            info.accessToken = val;<a name="line.176"></a>
<FONT color="green">177</FONT>          } else if (key.equals("expires_in")) {<a name="line.177"></a>
<FONT color="green">178</FONT>            // expires_in is seconds, convert to milliseconds and add to now<a name="line.178"></a>
<FONT color="green">179</FONT>            Double expiresIn = Double.valueOf(val) * 1000;<a name="line.179"></a>
<FONT color="green">180</FONT>            info.expires = String.valueOf(clock.now() + expiresIn);<a name="line.180"></a>
<FONT color="green">181</FONT>          } else if (key.equals("error")) {<a name="line.181"></a>
<FONT color="green">182</FONT>            error = val;<a name="line.182"></a>
<FONT color="green">183</FONT>          } else if (key.equals("error_description")) {<a name="line.183"></a>
<FONT color="green">184</FONT>            errorDesc = " (" + val + ")";<a name="line.184"></a>
<FONT color="green">185</FONT>          } else if (key.equals("error_uri")) {<a name="line.185"></a>
<FONT color="green">186</FONT>            errorUri = "; see: " + val;<a name="line.186"></a>
<FONT color="green">187</FONT>          }<a name="line.187"></a>
<FONT color="green">188</FONT>        }<a name="line.188"></a>
<FONT color="green">189</FONT>    <a name="line.189"></a>
<FONT color="green">190</FONT>        if (error != null) {<a name="line.190"></a>
<FONT color="green">191</FONT>          lastCallback.onFailure(<a name="line.191"></a>
<FONT color="green">192</FONT>              new RuntimeException("Error from provider: " + error + errorDesc + errorUri));<a name="line.192"></a>
<FONT color="green">193</FONT>        } else if (info.accessToken == null) {<a name="line.193"></a>
<FONT color="green">194</FONT>          lastCallback.onFailure(new RuntimeException("Could not find access_token in hash " + hash));<a name="line.194"></a>
<FONT color="green">195</FONT>        } else {<a name="line.195"></a>
<FONT color="green">196</FONT>          setToken(lastRequest, info);<a name="line.196"></a>
<FONT color="green">197</FONT>          lastCallback.onSuccess(info.accessToken);<a name="line.197"></a>
<FONT color="green">198</FONT>        }<a name="line.198"></a>
<FONT color="green">199</FONT>      }<a name="line.199"></a>
<FONT color="green">200</FONT>    <a name="line.200"></a>
<FONT color="green">201</FONT>      /** Test-compatible abstraction for getting the current time. */<a name="line.201"></a>
<FONT color="green">202</FONT>      static interface Clock {<a name="line.202"></a>
<FONT color="green">203</FONT>        // Using double to avoid longs in GWT, which are slow.<a name="line.203"></a>
<FONT color="green">204</FONT>        double now();<a name="line.204"></a>
<FONT color="green">205</FONT>      }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>      /** Test-compatible URL encoder/decoder. */<a name="line.207"></a>
<FONT color="green">208</FONT>      static interface UrlCodex {<a name="line.208"></a>
<FONT color="green">209</FONT>        /**<a name="line.209"></a>
<FONT color="green">210</FONT>         * URL-encode a string. This is abstract so that the Auth class can be<a name="line.210"></a>
<FONT color="green">211</FONT>         * tested.<a name="line.211"></a>
<FONT color="green">212</FONT>         */<a name="line.212"></a>
<FONT color="green">213</FONT>        String encode(String url);<a name="line.213"></a>
<FONT color="green">214</FONT>    <a name="line.214"></a>
<FONT color="green">215</FONT>        /**<a name="line.215"></a>
<FONT color="green">216</FONT>         * URL-decode a string. This is abstract so that the Auth class can be<a name="line.216"></a>
<FONT color="green">217</FONT>         * tested.<a name="line.217"></a>
<FONT color="green">218</FONT>         */<a name="line.218"></a>
<FONT color="green">219</FONT>        String decode(String url);<a name="line.219"></a>
<FONT color="green">220</FONT>      }<a name="line.220"></a>
<FONT color="green">221</FONT>    <a name="line.221"></a>
<FONT color="green">222</FONT>      TokenInfo getToken(AuthRequest req) {<a name="line.222"></a>
<FONT color="green">223</FONT>        String tokenStr = tokenStore.get(req.asString());<a name="line.223"></a>
<FONT color="green">224</FONT>        return tokenStr != null ? TokenInfo.fromString(tokenStr) : null;<a name="line.224"></a>
<FONT color="green">225</FONT>      }<a name="line.225"></a>
<FONT color="green">226</FONT>    <a name="line.226"></a>
<FONT color="green">227</FONT>      void setToken(AuthRequest req, TokenInfo info) {<a name="line.227"></a>
<FONT color="green">228</FONT>        tokenStore.set(req.asString(), info.asString());<a name="line.228"></a>
<FONT color="green">229</FONT>      }<a name="line.229"></a>
<FONT color="green">230</FONT>    <a name="line.230"></a>
<FONT color="green">231</FONT>      /**<a name="line.231"></a>
<FONT color="green">232</FONT>       * Clears all tokens stored by this class.<a name="line.232"></a>
<FONT color="green">233</FONT>       *<a name="line.233"></a>
<FONT color="green">234</FONT>       * &lt;p&gt;<a name="line.234"></a>
<FONT color="green">235</FONT>       * This will result in subsequent calls to<a name="line.235"></a>
<FONT color="green">236</FONT>       * {@link #login(AuthRequest, Callback)} displaying a popup to the user. If<a name="line.236"></a>
<FONT color="green">237</FONT>       * the user has already granted access, that popup will immediately close.<a name="line.237"></a>
<FONT color="green">238</FONT>       * &lt;/p&gt;<a name="line.238"></a>
<FONT color="green">239</FONT>       */<a name="line.239"></a>
<FONT color="green">240</FONT>      public void clearAllTokens() {<a name="line.240"></a>
<FONT color="green">241</FONT>        tokenStore.clear();<a name="line.241"></a>
<FONT color="green">242</FONT>      }<a name="line.242"></a>
<FONT color="green">243</FONT>    <a name="line.243"></a>
<FONT color="green">244</FONT>      /** Encapsulates information an access token and when it will expire. */<a name="line.244"></a>
<FONT color="green">245</FONT>      static class TokenInfo {<a name="line.245"></a>
<FONT color="green">246</FONT>        String accessToken;<a name="line.246"></a>
<FONT color="green">247</FONT>        String expires;<a name="line.247"></a>
<FONT color="green">248</FONT>    <a name="line.248"></a>
<FONT color="green">249</FONT>        String asString() {<a name="line.249"></a>
<FONT color="green">250</FONT>          return accessToken + "-----" + (expires == null ? "" : expires);<a name="line.250"></a>
<FONT color="green">251</FONT>        }<a name="line.251"></a>
<FONT color="green">252</FONT>    <a name="line.252"></a>
<FONT color="green">253</FONT>        static TokenInfo fromString(String val) {<a name="line.253"></a>
<FONT color="green">254</FONT>          String[] parts = val.split("-----");<a name="line.254"></a>
<FONT color="green">255</FONT>          TokenInfo info = new TokenInfo();<a name="line.255"></a>
<FONT color="green">256</FONT>          info.accessToken = parts[0];<a name="line.256"></a>
<FONT color="green">257</FONT>          info.expires = parts.length &gt; 1 ? parts[1] : null;<a name="line.257"></a>
<FONT color="green">258</FONT>          return info;<a name="line.258"></a>
<FONT color="green">259</FONT>        }<a name="line.259"></a>
<FONT color="green">260</FONT>      }<a name="line.260"></a>
<FONT color="green">261</FONT>    <a name="line.261"></a>
<FONT color="green">262</FONT>      /*<a name="line.262"></a>
<FONT color="green">263</FONT>       * @param req The authentication request of which to request the expiration<a name="line.263"></a>
<FONT color="green">264</FONT>       *        status.<a name="line.264"></a>
<FONT color="green">265</FONT>       * @return The number of milliseconds until the token expires, or negative<a name="line.265"></a>
<FONT color="green">266</FONT>       *         infinity if no token was found.<a name="line.266"></a>
<FONT color="green">267</FONT>       */<a name="line.267"></a>
<FONT color="green">268</FONT>      public double expiresIn(AuthRequest req) {<a name="line.268"></a>
<FONT color="green">269</FONT>        String val = tokenStore.get(req.asString());<a name="line.269"></a>
<FONT color="green">270</FONT>        return val == null ? Double.NEGATIVE_INFINITY :<a name="line.270"></a>
<FONT color="green">271</FONT>            Double.valueOf(TokenInfo.fromString(val).expires) - clock.now();<a name="line.271"></a>
<FONT color="green">272</FONT>      }<a name="line.272"></a>
<FONT color="green">273</FONT>    <a name="line.273"></a>
<FONT color="green">274</FONT>      /**<a name="line.274"></a>
<FONT color="green">275</FONT>       * Exports a function to the page's global scope that can be called from regular JavaScript.<a name="line.275"></a>
<FONT color="green">276</FONT>       *<a name="line.276"></a>
<FONT color="green">277</FONT>       * &lt;p&gt;Usage (in JavaScript):&lt;/p&gt;<a name="line.277"></a>
<FONT color="green">278</FONT>       * &lt;code&gt;<a name="line.278"></a>
<FONT color="green">279</FONT>       * oauth2.login({<a name="line.279"></a>
<FONT color="green">280</FONT>       *   "authUrl": "..." // the auth URL to use<a name="line.280"></a>
<FONT color="green">281</FONT>       *   "clientId": "..." // the client ID for this app<a name="line.281"></a>
<FONT color="green">282</FONT>       *   "scopes": ["...", "..."], // (optional) the scopes to request access to<a name="line.282"></a>
<FONT color="green">283</FONT>       *   "scopeDelimiter": "..." // (optional) the scope delimiter to use<a name="line.283"></a>
<FONT color="green">284</FONT>       * }, function(token) { // (optional) called on success, with the token<a name="line.284"></a>
<FONT color="green">285</FONT>       * }, function(error) { // (optional) called on error, with the error message<a name="line.285"></a>
<FONT color="green">286</FONT>       * });<a name="line.286"></a>
<FONT color="green">287</FONT>       * &lt;/code&gt;<a name="line.287"></a>
<FONT color="green">288</FONT>       */<a name="line.288"></a>
<FONT color="green">289</FONT>      public static native void export() /*-{<a name="line.289"></a>
<FONT color="green">290</FONT>        if (!$wnd.oauth2) {<a name="line.290"></a>
<FONT color="green">291</FONT>          $wnd.oauth2 = {};<a name="line.291"></a>
<FONT color="green">292</FONT>        }<a name="line.292"></a>
<FONT color="green">293</FONT>        $wnd.oauth2.login = $entry(function(req, success, failure) {<a name="line.293"></a>
<FONT color="green">294</FONT>          @com.google.api.gwt.oauth2.client.Auth::nativeLogin(*)(req, success, failure);<a name="line.294"></a>
<FONT color="green">295</FONT>        });<a name="line.295"></a>
<FONT color="green">296</FONT>    <a name="line.296"></a>
<FONT color="green">297</FONT>        $wnd.oauth2.expiresIn = $entry(function(req) {<a name="line.297"></a>
<FONT color="green">298</FONT>          return @com.google.api.gwt.oauth2.client.Auth::nativeExpiresIn(*)(req);<a name="line.298"></a>
<FONT color="green">299</FONT>        });<a name="line.299"></a>
<FONT color="green">300</FONT>    <a name="line.300"></a>
<FONT color="green">301</FONT>        $wnd.oauth2.clearAllTokens = $entry(function() {<a name="line.301"></a>
<FONT color="green">302</FONT>          @com.google.api.gwt.oauth2.client.Auth::nativeClearAllTokens()();<a name="line.302"></a>
<FONT color="green">303</FONT>        });<a name="line.303"></a>
<FONT color="green">304</FONT>      }-*/;<a name="line.304"></a>
<FONT color="green">305</FONT>    <a name="line.305"></a>
<FONT color="green">306</FONT>      private static void nativeLogin(AuthRequestJso req, JsFunction success, JsFunction failure) {<a name="line.306"></a>
<FONT color="green">307</FONT>        AuthImpl.INSTANCE.login(fromJso(req), CallbackWrapper.create(success, failure));<a name="line.307"></a>
<FONT color="green">308</FONT>      }<a name="line.308"></a>
<FONT color="green">309</FONT>    <a name="line.309"></a>
<FONT color="green">310</FONT>      private static double nativeExpiresIn(AuthRequestJso req) {<a name="line.310"></a>
<FONT color="green">311</FONT>        return AuthImpl.INSTANCE.expiresIn(fromJso(req));<a name="line.311"></a>
<FONT color="green">312</FONT>      }<a name="line.312"></a>
<FONT color="green">313</FONT>    <a name="line.313"></a>
<FONT color="green">314</FONT>      private static void nativeClearAllTokens() {<a name="line.314"></a>
<FONT color="green">315</FONT>        AuthImpl.INSTANCE.clearAllTokens();<a name="line.315"></a>
<FONT color="green">316</FONT>      }<a name="line.316"></a>
<FONT color="green">317</FONT>    <a name="line.317"></a>
<FONT color="green">318</FONT>      private static AuthRequest fromJso(AuthRequestJso jso) {<a name="line.318"></a>
<FONT color="green">319</FONT>        return new AuthRequest(jso.getAuthUrl(), jso.getClientId())<a name="line.319"></a>
<FONT color="green">320</FONT>            .withScopes(jso.getScopes())<a name="line.320"></a>
<FONT color="green">321</FONT>            .withScopeDelimiter(jso.getScopeDelimiter());<a name="line.321"></a>
<FONT color="green">322</FONT>      }<a name="line.322"></a>
<FONT color="green">323</FONT>    <a name="line.323"></a>
<FONT color="green">324</FONT>      private static final class AuthRequestJso extends JavaScriptObject {<a name="line.324"></a>
<FONT color="green">325</FONT>        protected AuthRequestJso() {<a name="line.325"></a>
<FONT color="green">326</FONT>        }<a name="line.326"></a>
<FONT color="green">327</FONT>    <a name="line.327"></a>
<FONT color="green">328</FONT>        private final native String getAuthUrl() /*-{<a name="line.328"></a>
<FONT color="green">329</FONT>          return this.authUrl;<a name="line.329"></a>
<FONT color="green">330</FONT>        }-*/;<a name="line.330"></a>
<FONT color="green">331</FONT>    <a name="line.331"></a>
<FONT color="green">332</FONT>        private final native String getClientId() /*-{<a name="line.332"></a>
<FONT color="green">333</FONT>          return this.clientId;<a name="line.333"></a>
<FONT color="green">334</FONT>        }-*/;<a name="line.334"></a>
<FONT color="green">335</FONT>    <a name="line.335"></a>
<FONT color="green">336</FONT>        private final native JsArrayString getScopesNative() /*-{<a name="line.336"></a>
<FONT color="green">337</FONT>          return this.scopes || [];<a name="line.337"></a>
<FONT color="green">338</FONT>        }-*/;<a name="line.338"></a>
<FONT color="green">339</FONT>    <a name="line.339"></a>
<FONT color="green">340</FONT>        private final String[] getScopes() {<a name="line.340"></a>
<FONT color="green">341</FONT>          JsArrayString jsa = getScopesNative();<a name="line.341"></a>
<FONT color="green">342</FONT>          String[] arr = new String[jsa.length()];<a name="line.342"></a>
<FONT color="green">343</FONT>          for (int i = 0; i &lt; jsa.length(); i++) {<a name="line.343"></a>
<FONT color="green">344</FONT>            arr[i] = jsa.get(i);<a name="line.344"></a>
<FONT color="green">345</FONT>          }<a name="line.345"></a>
<FONT color="green">346</FONT>          return arr;<a name="line.346"></a>
<FONT color="green">347</FONT>        }<a name="line.347"></a>
<FONT color="green">348</FONT>    <a name="line.348"></a>
<FONT color="green">349</FONT>        private final native String getScopeDelimiter() /*-{<a name="line.349"></a>
<FONT color="green">350</FONT>          return this.scopeDelimiter || " ";<a name="line.350"></a>
<FONT color="green">351</FONT>        }-*/;<a name="line.351"></a>
<FONT color="green">352</FONT>      }<a name="line.352"></a>
<FONT color="green">353</FONT>    <a name="line.353"></a>
<FONT color="green">354</FONT>      private static final class JsFunction extends JavaScriptObject {<a name="line.354"></a>
<FONT color="green">355</FONT>        protected JsFunction() {<a name="line.355"></a>
<FONT color="green">356</FONT>        }<a name="line.356"></a>
<FONT color="green">357</FONT>    <a name="line.357"></a>
<FONT color="green">358</FONT>        private final native void execute(String input) /*-{<a name="line.358"></a>
<FONT color="green">359</FONT>          this(input);<a name="line.359"></a>
<FONT color="green">360</FONT>        }-*/;<a name="line.360"></a>
<FONT color="green">361</FONT>      }<a name="line.361"></a>
<FONT color="green">362</FONT>    <a name="line.362"></a>
<FONT color="green">363</FONT>      private static final class CallbackWrapper implements Callback&lt;String, Throwable&gt; {<a name="line.363"></a>
<FONT color="green">364</FONT>        private final JsFunction success;<a name="line.364"></a>
<FONT color="green">365</FONT>        private final JsFunction failure;<a name="line.365"></a>
<FONT color="green">366</FONT>    <a name="line.366"></a>
<FONT color="green">367</FONT>        private CallbackWrapper(JsFunction success, JsFunction failure) {<a name="line.367"></a>
<FONT color="green">368</FONT>          this.success = success;<a name="line.368"></a>
<FONT color="green">369</FONT>          this.failure = failure;<a name="line.369"></a>
<FONT color="green">370</FONT>        }<a name="line.370"></a>
<FONT color="green">371</FONT>    <a name="line.371"></a>
<FONT color="green">372</FONT>        private static CallbackWrapper create(JsFunction success, JsFunction failure) {<a name="line.372"></a>
<FONT color="green">373</FONT>          return new CallbackWrapper(success, failure);<a name="line.373"></a>
<FONT color="green">374</FONT>        }<a name="line.374"></a>
<FONT color="green">375</FONT>    <a name="line.375"></a>
<FONT color="green">376</FONT>        @Override<a name="line.376"></a>
<FONT color="green">377</FONT>        public void onSuccess(String result) {<a name="line.377"></a>
<FONT color="green">378</FONT>          if (success != null) {<a name="line.378"></a>
<FONT color="green">379</FONT>            success.execute(result);<a name="line.379"></a>
<FONT color="green">380</FONT>          }<a name="line.380"></a>
<FONT color="green">381</FONT>        }<a name="line.381"></a>
<FONT color="green">382</FONT>    <a name="line.382"></a>
<FONT color="green">383</FONT>        @Override<a name="line.383"></a>
<FONT color="green">384</FONT>        public void onFailure(Throwable reason) {<a name="line.384"></a>
<FONT color="green">385</FONT>          if (failure != null) {<a name="line.385"></a>
<FONT color="green">386</FONT>            failure.execute(reason.getMessage());<a name="line.386"></a>
<FONT color="green">387</FONT>          }<a name="line.387"></a>
<FONT color="green">388</FONT>        }<a name="line.388"></a>
<FONT color="green">389</FONT>      }<a name="line.389"></a>
<FONT color="green">390</FONT>    }<a name="line.390"></a>




























































</PRE>
</BODY>
</HTML>
